摘要:
A liquid cooled thermal control system and method for cooling an imaging system are provided. One imaging system is a computed tomography (CT) system having a detector that is positioned on a detector rail. The detector includes a plurality of detector components. At least some of the detector components are configured to detect x-rays. A liquid cooled thermal control system is provided having cooling channels in thermal communication with the detector rail. The cooling channels have a cooling fluid flowing therethrough to control a temperature of the detector components in response to one or more disturbances that changes a temperature of the x-ray detector. A control module is also provided in the liquid cooled thermal control system to adjust parameters of the liquid cooled thermal control system in response to the disturbances.
摘要:
A computed tomography (CT) system comprises an X-ray radiation source to project a plurality of X-ray beams through an object. A detector array comprises a plurality of detector assemblies. A gantry secured to the X-ray radiation source and the detector array rotates around a longitudinal axis. Further, each of the detector assembly comprises a detector subassembly adapted to detect the X-ray beams. These detector subassemblies are further adapted to convert the X-ray beams to a plurality of electrical signals. At least one circuit board assembly is coupled to the detector subassembly. The circuit board assembly typically comprises an integrated circuit array, such as, data acquisition chip array to acquire data corresponding to the electrical signals. The integrated circuit array further comprises a plurality of integrated circuit chips, for example, data acquisition chips mounted on at least one printed circuit board. A thermal management system is adapted for thermal communication between the data acquisition chip array and a heat sink assembly to control the thermal environment of each detector assembly. A processor is typically configured to process the electrical signals to generate a plurality of projection measurements. The processor is further adapted to perform computations on the projection measurements to construct an image of the object therefrom.
摘要:
A method and system for variable speed fan control for thermal management of a device includes disposing a first temperature sensor proximate a variable speed fan to measure an air temperature of inlet air Tair that cools the device by convection air flow. A controller is configured to compensate for changes in Tair by varying a convection coefficient (h) which is a strong function of air velocity to maintain the product of h*ΔT at a constant value, wherein ΔT is a temperature differential between the device (TAD) minus Tair. Thus, h is varied by varying air velocity by varying a speed of the variable speed fan.
摘要翻译:一种用于设备的热管理的变速风扇控制的方法和系统包括将靠近变速风扇的第一温度传感器设置为测量通过对流空气来冷却设备的入口空气T空气的空气温度 流。 控制器被配置为通过改变作为空气速度的强函数的对流系数(h)来补偿空气中的变化,以将h * DeltaT的积保持在恒定值,其中DeltaT是 设备(T SUB AD)之间的温差减去空气 SUB>。 因此,通过改变变速风扇的速度来改变空气速度h。
摘要:
A computed tomography (CT) system comprises an X-ray radiation source to project a plurality of X-ray beams through an object and a detector array comprising a plurality of detector assemblies. Each of the detector assembly further comprises a detector subassembly adapted to detect the X-ray beams and further adapted to convert the X-ray beams to a plurality of electrical signals and at least one integrated circuit array, for example, data acquisition chip array to acquire data corresponding to the electrical signals. The integrated circuit array, for example, data acquisition chip array further comprises a plurality of integrated circuits, such as, data acquisition chips mounted on at least one printed circuit board and a thermal management system adapted for thermal communication between the data acquisition chip array and a heat sink assembly to control thermal environment of each detector assembly. The heat sink further comprises a spreader plate extending over 2 or more data acquisition chips to reduce the temperature difference within the data acquisition chips.
摘要:
The present invention discloses a method and apparatus for cooling the electronics associated with Computed Tomography (CT) detector arrays. More particularly, the present invention discloses use of thermoelectric coolers in cooling CT detector electronics. The present invention also provides for using blowers or fans to recirculated air within a plenum for the cooling of CT detector electronics. The present invention also discloses the use of wick type heat pipes being placed either horizontally or with the evaporator end radially farther out than the condenser end such that rotational forces assist with heat flow through the heat pipe for cooling CT detector electronics. The present invention also discloses use of axial groove heat pipes to cool the CT detector electronics because they have enhanced performance under revolving conditions. Lastly, the present invention discloses use of heat sinks and circulation fans in combination with either type of heat pipe.
摘要:
A method is provided for image detection. The method includes measuring a temperature of an analog-to-digital (A/D) converter of an imaging system during an imaging scan of an object, and correcting a gain of the A/D converter based on the measured temperature of the A/D converter.
摘要:
A lamp having a lighting source, integral electronics, and a thermal distribution mechanism disposed in a housing. The thermal distribution mechanism may include a variety of insulative, radiative, conductive, and convective heat distribution techniques. For example, the lamp may include a thermal shield between the lighting source and the integral electronics. The lamp also may have a forced convection mechanism, such as an air-moving device, disposed adjacent the integral electronics. A heat pipe, a heat sink, or another conductive heat transfer member also may be disposed in thermal communication with one or more of the integral electronics. For example, the integral electronics may be mounted to a thermally conductive board. The housing itself also may be thermally conductive to conductively spread the heat and convect/radiate the heat away from the lamp.
摘要:
This invention provides a process for enhancing the generation of hydroxyl radicals in aqueous mixtures containing hydrogen peroxide, which process comprises supplying oxygen and magnesium oxide to the mixture and irradiating it with UV light. The process can be used, for example, for processing ballast water, industrial waste waters, and municipal waste waters.
摘要:
A data acquired system is provided. The data acquired system includes a main structure with a cavity formed therein, the cavity having a bottom for mounting a circuit board with electrical components thereto, a fan assembly disposed on the main structure, and an airflow guide disposed within the cavity and configured to guide airflow from the fan assembly for heat dissipation of the electrical components, the airflow guide positioned at a distance above the electrical components to form a gap between the airflow guide and the electrical components, wherein a sidewall of the cavity is provided with an air vent corresponding to the gap such that the airflow passes through the gap and is discharged from the air vent.
摘要:
The invention provides a purchase sequence browser (PuSB), i.e. a graphical user interface (GUI) that facilitates insight discovery and exploration of product affinities across time, generated by a purchase sequence analysis of a retailer's transaction data. A purchase sequence browser allows the user to browse the most significant product phrases discovered by an exhaustive search of the product affinities across time; explore the retail grammar to create both forward and backward phrase trees or alternate purchase paths starting from, or ending in, a product; generate consistent purchase sequences given some constraints on the products and their order; and profile the value of a product across time with regard to other products fixed in time.